rogers



(ModeL) 2 Sheets-Sheet I.

G. T. ROGERS.

LOOK.

No. 447,623. Patented Mar. 3, L891.

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(Model.) 2 Sheet -Sheet 2. G. T. ROGERS.

LOOK

No. 447,623. Patented Mar. 3, 189 1.

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UNITED STATES ATENT FFICE.

GRANDISON T. ROGERS, OF JEFFERSON CITY, MISSOURI.

LOCK.

SPECIFICATION forming partof Letters Patent No. 447,623, dated March 3, 1891.

Application filed April 26, 1890- Serial No. 349,595. (Model) To all whom it may concern:

Be it known that I, GRANDIsoN T. ROGERS, of Jefferson City, in the county of Cole and State of Missouri, have invented a new and Improved Look, of which the following; is a full, clear, and exact description.

The object of the invention is to provide a new and improved lock which is simple and durable in construction, and is arranged in such a mannerthat it is impossible to unlock it from oneside when it has been locked on the other side.

The invention consists of a bolt fitted to slide and provided with notches, and a springpressed lever adapted to engage the said notches and operated on by the key in conjunction With the bolt.

The invention also consists in certain parts and details and combinations of the same, as will be described hereinafter, and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a face view of the lock with the cover-plate removed. Fig. 2 is'an inside face view of the cover-plate. Fig. 3 is an inverted sectional plan view of the improvement on the line a: a: of Fig. 1. Fig. 4 is a similar view of the same on the line y y of Fig. 1. Fig. 5 is a sectional plan view of the same on the line .2 .2 of Figs. 1 and 2. Fig. 6 is a perspective view of the latch, and Fig. 7 is a perspective view of the bolt.

The improved look A is provided with a suitable casing B, adapted to be covered by a cover-plate O, fastened to the casing by suitable bolts or other means. In the casing 13 is fitted to slide the locking-bolt D, supported at its inner end' on a pin E, projecting from the casing and passing through a longitudinal slot D in the said bolt. On the under side of the bolt D are formed the V-shaped notches F and F, into which is adapted to pass the bit of the key, which may be inserted from the inside of the door on which the lock is applied through a key-hole G, formed in the cover-plate C, or the said key maybe inserted from the outside through a key-hole G, formed in the casing B, the two key-holes G and G being arranged suitable distances apart and in line with the notches F and F, respectively. Thejbit of the key is also adapted to operate on the under side of a lever H, extending through a vertical slot D formed in the bolt D, as is plainly illustrated in Fig. 7. The lever H is fulcrumed at H to the casing B, and is provided with a lug H adapted to engage alternately notches D and D formed on the top of the lever D. The lever H is also pressed downward by a spring I, so as to hold the lug H firmly in engagement with the respective notch D or D The lever H extends across the notches F and F, so as to be engaged at its under side by the bit of the key when the latter operates on the bolt in either of the said notches, as hereinafter more fully described. Then the key is introduced into the casing B through the key-hole G in the cover'plate G, then the bit of the key passes into a rectangular aperture formed in a vertically-arranged plat'e J, fitted to slide in suitable guideways K, formed on a plate K, fitted to slide longitudinally in suitable bearings 13', formed on the casing B, and on a lug B extending inward from the casing B and engaging a slot in the plate, said lug being provided with a round aperture B to receive the inner end of the key-shank. The plate K is provided with a key-h0le K adapted to connect with or disconnect from the key-hole G, formed in the back of the casing B.

On the lower end of the plate J, previously mentioned, is formed alug J, adapted to engage alternately the notches N and N formed in a bar' N, secured to the inside of the casing B, the lug J of the said plate J being pressed into contact with either of the said notches by means of a spring L, secured to the plate K and pressing with its free end on a pin J projecting from the plate J. A similar arrangement to the one j ust described is formed on the inside of the cover-plate Othat is, a plate 0 is provided which is fitted to slide vertically in suitable bearings P, formed in a plate P, constructed similarly to the plate K, and mounted to slide on suitable bearings C, fastened or formed on the inside of the cover-plate O, and on a lug G on the plate 0 engaging a slot in the plate and provided with a round aperture 0 to receive the end of thekey-shank. The plate 0 is provided with a rectangular aperture, into which is adapted to pass the bit of the key when the latter is inserted through the key-holes G and K to operate on the bolt D in the notch F.

On the. lower end of the plate 0 is formed the ing 0, adapted to engage alternately the notches Q and Q formed in the bar Q, secured to the inside of the cover-plate 0, being similar to the bar N, previously mentioned. A spring L, held on the plate 1, presses on a pin 0*, projecting from the plate 0. (See Fig. 2.)

In the plate P is formed a key-hole P adapted to connect with or disconnect from the key-hole G, formed in the cover-plate C, and previously mentioned. The positions of the two plates K and I are such that when the bolt l) is in an outermost position the keyhole of one of the said plates registers with its respective key-hole and the other is dis connected from its key-hole, and vice versa.

In the upper. part of the casing 13 is fitted to slide a latch R, which is made reversible, and which is for this purpose provided in its shank R with oppositely-arranged notches R and R forming a double-head It". (See Fig. (5.) The latter is adapted to engage a recess 5 in the head S, secured on the bars 8 connected with each other at their rear end by a flange S operated on by the tumbler T, through which passes the usual doorknob shaft T for turning the said tumbler. A pin S' projects from the head S and passes through a bearing B projecting from the casing 13. A spring S is coiled on the said pin S and rests with one end against the said bearing B a-11d its other end against the said head S, so as always to hold the latch R in an outermost position, unless the said latch is pressed inward by the turning of the doorknob in the usual manner, so as to compress the spring \Vhen the pressure on the door-knob is released, the compressed spring 5* forces'the latch to its outermost position again. The head S is fitted to slide between a movable block U and a stationary block V, secured to the casing B. The movable block U fits onto the top of the head S and is provided with a pin U, passing through a longitudinal slot B formed in the top of the easing 1 as is plainly shown in Fig. 3.

On the outside of the pin U is arranged a button U for conveniently moving the block U forward or backward to uncover the top of the head S, so as to remove the latch R from the said head in order to turn it over when it is desired to reverse the latch R. hen the latter has been accomplished, the block U is again moved to its position, so as to hold the head R in engagement with the head S.

The operation is as follows: As shown in Fig. 1,the bolt D is in an innermost position and the door is unlocked, except by thelatch R, in the usual manner. W'hen the bolt is in this position, the key-hole G in the cover plate C registers with the key-hole P in the plate I, and the keyholes K and G also reg isier with each other. \Vhen an operatoron the inside of the door desires to lock thedoor, the key is inserted through the key-holes G and P and turned so that the bit of the key first raises the lever Il, so as to disconnect its lug ll from the notch I)". Then the bit of the key passes against the left edge of the notch F and shifts the bolt D into an outermost position,locking the door. At the same time the bit of the key acts on the plate .l, so as to first raise the latter with its lug J out of contact with the notch N and then by the bit of the key acting against the side of the said plate J pushes the entire plate K to the left, so that the key-hole K isdisconnected from the key-hole G, as shown in Fig. 5, and the plate J again slides downward to engage with its lug J the notch N by the action of the spring L. Now a key cannot be inserted from the outside of the door, as the key-hole G is closed. In order to unlock the door from the inside, the operator again inserts the key in the key-holes G and P and turns the key in an opposite direction, so that the lever 11 is first swung upward, the bolt D is shifted inward until the lug 11 again drops into the notch D, and at the same time the plate J is raised and the plate K shifted to the right, so that the key-hole K again registers with the key-hole G" in the casing 13. The plate K, with the plate J, is again locked in place by the lug J engaging the notch N of the fixed bar N. Now when the operator desires to lock the door from the outside he inserts the key through the key-holes G and K turns the key so that the bit of the keypasses into the notch F and raises the lever II to unlock the bolt D, which by the bit of the key engaging the left side of the notch F causes the bolt D to slide outward. The lug Ill then drops into the notch Dand locks the bolt in place. At the same time the bit of the key acts on the plate 0, so as to raise the latter in order to disconnect its lug 0 from the notch (Rafter which the movement of the bitpressing against one side of the plate 0 shifts the plate P to the left and the key-holes P and G are disconnected. The lug 0 then drops into the notch Q and the plate P is locked. It will be seen that as the keyhole G is now covered up a key cannot be inserted into the look from the inside of the door.

llaving thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a lock, the combination, withacasing having akey-hole and a cover for the said casin g having a key-hole, the said key-holes not beingin line with each other, of plates fitted to slide in the said casing and on the said cover, each provided with akey-hole adapted to register with its respective key-hole in the said casing or cover, and a bolt fitted to slide in the said casing and provided with notches adapted to be engaged by the bit of the key,

which is also adapted to operate the said plates to shift the latter longitudinally, and a spring-pressed locking-plate held to slide Vertically in the said plates, substantially as shown and described.

2. In a lock, the combination, with a plate provided with a key-hole and fitted to slide longitudinally, of a second plate fitted to slide vertically in the said first-named plate and provided with an aperture adapted to be engaged by the bit of the key, and means, substantially as described, for locking the said vertically-slidingplate in position, as set forth.

In a lock, the combination, with a plate having a key-hole and fitted to slide longitudinally, of guideways arranged vertically on the said plate, an apertured plate fitted to slide vertically on the said first-named plate and adapted to be acted on by the bit of the key, a notched bar, and a spring held on the said first-n amed plate and pressing on the said second-named plate to engage the latter alternately with notches in the said bar, substantiallyas shown and described.

4. 1n alock, the combination of alatch having a notched shank, a spring-pressed and sliding head having its upper face recessed to receive the notched shank of thelatch, and a sliding block above the head and covering the recess thereof, the said block serving as one of the guides for the head and adapted to be operated from the outside to permit the latch to be reversed, substantially as described.

. GRANDISON T. ROGERS. Witnesses:

THOMAS E. MAHAN, O. W. WALLENDORF. 

